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https://issues.apache.org/jira/browse/YARN-128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13494202#comment-13494202
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Bikas Saha commented on YARN-128:
---------------------------------
Attaching a proposal doc and code for the first iteration. The proposal is in
the same lines as the earlier initial design sketch but limits the first
iteration of the work to restarting the applications after the RM comes back
up. The reasoning and ideas are detailed in the doc.
Attaching some code that implements the proposal. It includes a functional test
that verifies the end-to-end scenario using an in-memory store. If everything
looks good overral then I will tie up the loose ends and add more tests.
For review, the code is broken into 1) removal of old code 2) new code + test.
There are TODO comments in the code where folks could make suggestions. The
code is attached in full for a build and test pass on Jenkins because my
machine is having long host resolution timeouts. Any ideas on this?
During the testing I found a bug in the CapacityScheduler because of which it
fails to activate applications when resources are added to the cluster. Folks
can comment on the fix. There is a separate test case that shows the bug and
verifies the fix.
> Resurrect RM Restart
> ---------------------
>
> Key: YARN-128
> URL: https://issues.apache.org/jira/browse/YARN-128
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.0.0-alpha
> Reporter: Arun C Murthy
> Assignee: Bikas Saha
> Attachments: MR-4343.1.patch, RM-recovery-initial-thoughts.txt,
> RMRestartPhase1.pdf, YARN-128-combined.patch, YARN-128.new-code.1.patch,
> YARN-128.patch, YARN-128.remove-old-code.1.patch
>
>
> We should resurrect 'RM Restart' which we disabled sometime during the RM
> refactor.
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